One vertex per element, one color per generator, with an edge from x to x·s.
(2,6)(7,8)(9,10)(11,15)(12,14)(13,16)(17,18)(19,26)(20,29)(21,24)(22,30)(23,25)(27,28)(31,32) involution — undirected(1,2)(3,7)(4,8)(5,6)(9,11,14,13)(10,15,12,16)(17,19,23,21)(18,24,25,26)(20,27,30,31)(22,28,29,32)(1,3,5,4)(2,7,6,8)(9,12,14,10)(11,15,13,16)(17,19,23,21)(18,24,25,26)(20,27,30,31)(22,28,29,32)(1,3,5,4)(2,7,6,8)(9,13,14,11)(10,15,12,16)(17,20)(18,22)(19,27)(21,31)(23,30)(24,28)(25,29)(26,32)(1,4,5,3)(2,8,6,7)(17,21,23,19)(18,24,25,26)(20,27,30,31)(22,32,29,28)(17,22)(18,20)(19,28)(21,32)(23,29)(24,27)(25,30)(26,31) involution — undirectedA Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.